AssemblyAI Voice Agent API vs ElevenLabs Conversational AI: Which is better for voice agents?

ElevenLabs started as a text-to-speech company. Their Conversational AI product (sometimes called Eleven Agents) extends that TTS focus into the voice agent space - combining speech input, reasoning, and voice output into a single managed platform. AssemblyAI's Voice Agent API was built for production voice agents from the ground up. Powered by Universal-3 Pro Streaming - the model on the Hugging Face Open ASR Leaderboard - it starts with world-class speech understanding and builds the rest of the pipeline around getting the input right.